Lubricant cooling radiator for rear engine vehicles



' Feb. 3, 1948.

c. R. ROGERS ET AL ,435,513

LUBRICANT COOLING RADIATOR FOR REAR ENGINE VEHICLES Filed July 19. 1943s Sheets-Sheet 1 Feb. 3, 1948.

C. R. ROGERS EI'AL LUBRICANT COOLING RADIATOR FOR REAR ENGINE VEHICLESFiled July 19, 1943 3 Sheets-Sheet 2 \N m? o fi 1a a; l

NK N ms h PMQP Feb. 3, 1948. c. R. ROGERS Erm,

LUBRICANT COOLING RADIATOR FOR REARENGINE VEHICLES Filed July 19, 1945 3Sheets-Sheet 3 Patented Feb. 3, 1948 LUBRICANT COOLING RADIATOR FOR REARENGINE VEHICLES Clifford R. Rogers, Oak Park, William 0. Bechman,Chicago, and David B. Baker, Riverside,

Ill., assignors to International Harvester Company, a corporation of NewJersey Application July 19, 1943, Serial No. 495,264

This invention relates to a new and improved lubricant cooling radiatorfor vehicles having ongines at the rear thereof.

Heretofore, tractors. and particularly those tractors of the track type,have employed the prime mover or engine at the forward end of thetractor chassis. In contradistinction to this arrangement, the presentinvention employs an engine at the rear of the tractor, chassis. Othershave also placed the engine at the rear of a vehicle, but, whereaspreviously the positionin of the engine at the rear end of the chassiswas for the purpose of having the source of power closely adjacent therear driving wheels or tracks. the present invention employs an extendedrelationship of power drive units essential in operating any vehicle andpositioned in substantially inverse order to that of an ordinary vehicleand wherein the differential is at the extreme forward end of thechassis.

An important object of this invention is to provide a rear enginevehicle with coolant radiators positioned at either side thereof and anengine lubricant radiator in longitudinal alignment with one of saidcoolant radiators.

Another important object of this invention is the provision of singlemeans for drawing air in through side mounted coolant and lubricantradiators positioned adjacent the rear of a'vehicle.

Other and further important objects of this invention will becomeapparent from the disclosures in the fOllOWlllg specification andaccompanying drawings, in which:

Figure 1 is a top plan view of the tractor chassis, showing the severaldrive units mounted thereon;

Figure 2 is a sectional view of the on the line 2-2 of Figure 1; and

Figure 3 is a continuation of the sectional view of Figure 2 taken onthe line 3-3 of Figure 1.

As shown in the drawings. the reference numeral l| indicates generally achassis of a tractor Vehicle comprisin a, pair of longitudinallyextending beams l2 'and a pair of transverse hol low beams I3 fixedlyattached to the longitudinal beams, so that the entire chassis Ii is asa single unit. Track assemblies I4. consisting of an outer flexibletrack l8, two pairs of bogie wheels l1, their supporting brackets l3. asbest shown in Figures 2 and 3, an idler wheel i9, and a front drivesprocket 2|, are mounted on the outer ends of the transverse chassisbeams I3 at 22.- The tractor taken brackets l8 connect the axles l ofbogie wheels IT. The brackets l3 are in turn pivoted centrally 1 Claim.(Cl. 180-54) about a shaft 23 to enable the bogie wheels to have thenecessary flexibility when striking an obstacle. The drive sprockets 2|are positioned at the forward end of the vehicle, as can be seen inFigure 2 of the drawings. An engine or prime mover 23 employed on thevehicle is positioned on the rear end of the longitudinal beams I! ofthe tractor chassis H, as shown in Figures 1 and 3. The engine 23 isequipped with a pair of radiators 24 mounted alongside the engine andpositioned parallel with the longitudinal chassis beams l2. An enginefan 23. is positioned at the rear of the engine and when in operationdraws air in through the side-mounted radiators 24. A

supplemental radiator 21 is positioned forwardly of one of the hot waterradiators 24 and is adapted to cool the lubricant employed in atransmission 23 and a difierentiai 23 by means of a supply tube 3iextending therebetween.

The engine 23 drives a crank-shaft 32 which transmits its rotation to aclutch 33 positioned closely adjacent the engine and forwardly thereof.The clutch 33 is of the dual speed type wherein the rotation of afly-wheel 34 may be transmitted directly through a entral shaft 38 orthrough a superposing sleeve shaft 31 by engagement respectively of ashiftable clutch plate 38 with either a clutch plate 39 in a leftwarddirection or with a clutch plate 4| in a rightward direction, When theclutch plates 38 and 39 are engaged, the central shaft 36 is driven anddrives directly through a universal joint 42 to a propeller shaft 43,whereas, when the clutch plates 38 and 4| are engaged, the sleeve 31 isdriven and drives the shaft 38 indirectly through gears 44, 46. and 41and thus drives the propeller shaft 43st 9, reduced rate of speed.

The ropeller shaft 43, as shown in Figure 2, extends forwardly to auniversal driving joint 48 around which is positioned a brake shoe 49adapted to engage a drum 5| which is formed as a unit with a drivenshaft 52. A brake 53 consisting of the brake shoe 4!! and the brake drum5| is automatically actuated by means of a clutch selector 54 when thedrive in the clutch is shifted. from the central shaft 33 to the outersleeve shaft 31, or vice versa. In other words, shifting of the clutchspeeds takes place when the driving and driven elementsare stopped orsubstantially stopped.

The final drive or differential 23 is positioned closely adjacent thetransmission 28 and immediately forward thereof, so that a bevel piniongear 6| driven from the transmission 23 and imparting rotation to abeveled gear 62 drives the sprockets 2| through gears 33 and 68.Houslugs 66 and 81 of the transmission and diflerentiai, respectively,are interconnected, so that a lubricant in one housing flows freely tothe other.

In furtherance of this lubricating, a fllter 68, 5

provided within the final drive housing 61,.v is adapted to clean thelubricant and cause it to be cooled by forcing it through the tube illto the lubricant cooling radiator 21, whereupon it bearings in thetransmission through a central channel H in the shaft 52, as shown inFigure 2.,

.The tractor vehicle is supplied with several operating levers andpedals, such as a gear shift is returned through a tube 69 andlubricates the lever 12, which is adapted to shift the ears in thetransmission 28, steering or brake levers I3. and a clutch pedal 14. Thesteering levers 13 are two in number and, as in the majority oftrack-type tractors, a shifting of either one of them with respect tothe other causes a change in the driving ratio between the drivingsprockets 2| by reason of brakes 16 positioned in the differential 29.

The clutch pedal 14 is directly connected to said engine, a transmissionand differential positioned on the fore end of the chassis, a lubricantfor said transmission and differential, and a radiator for eflectingcooling of said lubricant, said last-named radiator in longitudinalalinement with and positioned forwardly of one of said the clutchselector 54 and acts to shift the lever arm 'II either upwardly ordownwardly, thereby causing a shifting of the dual clutch plate 38.

The purpose of the winch 59 is to assist in pulling the vehicle when itis stuck. In traveling over rough terrain, ditches, or the like, a cableis generally attached to some tree or other solid object, and the cableis then wound up on the winch, thus drawing the vehicle toward the treeor other stationary object.

It will be apparent from the particular construction of the chassis andthe positioning of the power drive units thereon that the driving forceswill be transmitted through a minimum number of parts to a drawing hitch18 at the rear of the vehicle. This particular tractor is 40 designedespecially to draw heavy guns or cargo trailers, and it is, therefore,essential that the vehicle be built as sturdy as possible, enabling thetraction tracks It to transmit their driving force through thetransverse beam l3 of the chassis, thence back through the longitudinalbeams ii of the chassis to a cross member 19 and there to the hitch.

It is believed that the positioning of the drive units in an inverseorder to that of the ordinary vehicle is novel, and it is especiallybelieved that engine radiators, whereby the fan positioned at the rearof'the engine is adapted to draw air in through all three radiatorsthereby causing cooling of lubricant in the lubricant radiator and waterin the water engine radiators.

CLIFFORD R. RJOGERS. I WILLIAM O. BECHMAN. DAVID B. BAKER.

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